The medial geniculate nucleus (MGN) or medial geniculate body (MGB) is part of the auditory thalamus and represents the thalamic relay between the inferior colliculus (IC) and the auditory cortex (AC).

The MGN has three major divisions; ventral (VMGN), dorsal (DMGN) and medial (MMGN).

Binaural cells are typically similar to the EE or EI type found in the IC.

Generally, the responses are broadly tuned, but some cells appear to respond only to complex stimuli.

In this type of cell, the response actually decreases as sound intensity increases above a specific level.

Anaesthetics tend to have large effects on cells within the MMGN, making responses difficult to study.